前言:
Event在python线程间同步是一种常用的方法,本博客以生产者线程和工作者线程为例说明Event在线程间进行10次同步的应用。
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import threading from threading import Event, Thread import time import random from time import sleep pevent = Event() #默认是没有事件的 pevent.clear() cevent = Event() cevent.clear() runtimes = 10 mutex_lock = threading.Lock() class ProducerThread (threading.Thread): def __init__( self , name, runflag): threading.Thread.__init__( self ) self .name = name self .runflag = runflag self .continueflag = Event() self .continueflag. set () def run( self ): global runtimes sleep( 1 ) print ( "开始线程:" + self .name) while self .continueflag.isSet(): print ( "wait consumer ..." ) if runtimes = = 0 : self .continueflag.clear() break pevent.wait() print ( "come an consumer ..." ) mutex_lock.acquire() runtimes = runtimes - 1 mutex_lock.release() pevent.clear() sleep( 1 ) cevent. set () print ( "退出线程:" + self .name) self .runflag. set () class ConsumerThread (threading.Thread): def __init__( self ,name, runflag): threading.Thread.__init__( self ) self .name = name self .runflag = runflag self .continueflag = Event() self .continueflag. set () def run( self ): global runtimes print ( "开始线程:" + self .name) while self .continueflag.isSet(): if 0 = = runtimes: self .continueflag.clear() pevent. set () break print ( "I want to consum ... " , runtimes) pevent. set () #通知生产者要消费 cevent.wait() cevent.clear() sleep( 1 ) print ( "退出线程:" + self .name) self .runflag. set () def test_pthread(): runflag = Event() pt = ProducerThread( "producer" , runflag) ct = ConsumerThread( "consumer" , runflag) pt.start() ct.start() pt.join() ct.join() runflag.wait() if __name__ = = '__main__' : print ( '===============begin=================' ) test_pthread() print ( '===============end=================' ) |
运行结果如下:
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原文链接:https://blog.csdn.net/hsy12342611/article/details/124065314